Sports science, distilled.
Summaries and analysis of key research papers in sports science, velocity-based training, and performance measurement.
Bar Velocity Feedback Effects on Resistance Training Performance
Real-time bar velocity feedback raises power output, but the timing of the cue changes the result: concurrent versus terminal cueing, compared directly.
Bilateral Deficit: Unilateral vs Bilateral Strength Research Review
Bilateral force output falls short of the sum of both legs working alone. The neural cause, which sports it affects most, and how VBT flags the asymmetry.
Eccentric Quasi-Isometric (EQI) Training Review
EQI training sustains sub-maximal eccentric loads for 30-120 seconds, driving unique tendon and motor-unit adaptations, with hold-time benchmarks.
EMG Signal Interpretation for Training Applications
How to read EMG signals for training decisions: muscle activation norms, fatigue indices, RMS vs peak amplitude, and practical applications for coaches.
Velocity Decline Under Fatigue: Mechanisms, Thresholds, and VBT Applications
How neuromuscular fatigue drives within-set velocity decline — metabolic and neural mechanisms, velocity-loss thresholds, and training-goal alignment.
Force-Time Curve Analysis: Performance Assessment Methods
Two athletes can jump the same height with very different force-time curves — and different injury risk. Here's how curve shape is measured in practice.
Groin Injury and Hip Adductor Strength: What the Research Shows
A low adductor-to-abductor strength ratio is one of the strongest predictors of groin injury. See the Copenhagen adduction norms and prevention protocol.
Ground Reaction Force Asymmetry: Injury Prediction and Correction
How much left-right ground reaction force asymmetry is dangerous? See the limb symmetry index thresholds and corrective drills that flag injury risk early.
Isokinetic Strength Assessment in Sports: Applications and Limitations
Isokinetic dynamometry is the lab standard for H:Q ratios, but injury prediction validity is mixed. Angular velocity effects and field alternatives inside.
Jump Asymmetry and Injury Prediction: Research Review
An 11-study meta-analysis found limb symmetry under 90% on hop tests raised injury odds 2.4x. Thresholds, test choice, return-to-sport cutoffs inside.
Load-Velocity Relationship Accuracy Meta-Analysis
A meta-analysis of load-velocity relationship accuracy in VBT: where error creeps in, how exercises compare, and which sensors you can trust in the gym.
Minimum Velocity Threshold (MVT): Comprehensive Research Review
A fixed MVT can misjudge your squat 1RM by over 15 kg. This review explains why minimum velocity threshold swings 70% between lifters and how to set yours.